Inkstand with a constant level of ink.



1. BENGU.

INKSTAND WITH A CONSTANT LEVEL 0F INK.,

v l APPLICATION FILED )UNE 3, I9I5. www5.

Patented Aug. 29, 1916.

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INKSTAND WITH A CONSTANT LEVEL 0F INK.

Lwf Patented Aug. 29, 1916.

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APPLICATION FILED JUNE 3 ISIS.

IIIIIIIIIIIII Jams 56225@ irri l l l l JULES BENGU, on Panis, rennen.

Application filed .une 3, 1915.

To (all iufm/nt t may concern Be it known that l, JULns Ennemi, a citizen of the French `Republic, and residing at @L7 Rue Blanche, Paris, France, have invented certain new and useful lmprovements in and Relating to an Inkstand with Constant Level of link, of which the following is a complete specification.

The present invention relates to an inle stand with a constant level of ink.

rlhere are inkstands in which the ink is maintained in a reservoir by the atmospheric pressure and descends intoa cavity serving as a small cup in which the pen is dipped. rllhe level o-f the cup would always be constant if it were not for the sudden changes in temperature and as the latter are frequent in the winter (the parts cooling during the night and the temperature rising quickly owing to heating), the level of the cup may vary until it fully covers the pen which is a serious inconvenience.

The inlstand according to the invention eliminates this inconvenience. A so-called relief or auxiliary cavity is formed around the dipping cup and if there is an excess of ink arising from a higher temperature, it spreads over a fairly large surface so that the variation of the level is insignificant. jWhen the temperature drops again, the excess of ink enters the auxiliary cavity and the dipping cup reassumes .its normal level.

rlhe above mentioned trouble is due to the contraction or expansion of the air contained in the auxiliary cavity above the ink, these changes taking place when the temperature varies. They are much more substantial if there is less ink in the auxiliary cavity and therefore more air.

rlhe accompanying drawing illust ates a constructional form of the invention, in which Figure 1 is a perspective view o f the inkstand, Fig. 2 is aV vertical transverse section. Fig. 3 is a section taken on line ril-A of Fig. 2, Fig. l is a perspective view of a modification of the inkstand, Fig. 5 is a vertical section taken on the axis of the drain of Fig. 4, Fig. 6 is a section taken on line B-B of Fig. 5, Fig. 7 shows in perspective, one half of the inkstand taken on a vertical plane passing through the axis of the drain of Fig. 4.

Referring to the drawing, the inkstand is composed of the two parts. The first part a Specicaton of Letters Patent.

Patented Aug. 29,`l9i6.

serial No. 31,883.

constitutes the auxiliary reservoir. On the side there is an opening for filling` purposes, adapted to be closed by a plug c. By inclining the inkstand, ink is poured in through the said opening which is subsequently closed. The second part Z of the inlrstand, constitutes the inkstand proper. At the bottom there is the dipping well, e `which is always filled with ink as it is connected through the medium of a drain f with the auxiliary reservoir a. In proportion to the amount of ink used, the latter leaves the auxiliary reservoir in order to replace the ink utilized. rl`he height of the dipping well e is about l5 millimeters, a height which is sufficient for dipping a pen. lfforeover, the bottom r/ of this well is convex so as to enable impurities to slide down on the sides and leave clear the surface on which the pen drops or comes into contact.

Above the dipping well, the so-called relief cavity 7e, is provided and if there is an excess of ink, it will spread into this large cavity and prevent the level from varying.

The opening for the pen is constituted by a dipping cone z' the lower opening j of which is about l centimeter; in this manner as little ink as possible is permitted to evaporate and its preservation is insured.

The cone is formed with an aperture 7c on its side, the purpose of which is to enable air contained in the relief cavity ito escape when there is an excess of ink. lf this aper* ture did not exist, air contained in the said cavity would, owing to its compression, prevent the ink from spreading readily and force the same to rise in the dipping cone; the ink level would therefore be too high for the pen, the avoidance of which result, is the object of the present invention.

The modification illustrated in Figs. 4 to 7, permits of giving the reservoir as great a volume as desired while not increasing the weight of the inlstand and giving the latter a regular shape which is compact and stable at the same time. In this modifica.- tion, a designates the main reservoir filled through the opening Z); e is the well always filled with ink owing to the provision of the drain 7, h is the chamber in which ink may spread freely thereby preventing the same from rising in the-dipping cone z under the action of sudden variations in the temperature. The reservoir a, completely surrounds the spreading chamber 71, and has an exterrrial symmetrical shape shown in Figs. 4t to The following advantages are attached to this inkstand: 1.- Once the inkstand is filled it serves several months, hence economy in ink and time. 2.The pen always dips at a good height. 3.-The pen comes into contact with a surface which is always free from impurities.

The inkstand may be made of any suitable material such as porcelain, glass, metal or other material; its dimensions may, of course, vary on the condition, however, that the relief cavity has-a greater cross-sectional area vthan that of the reservoir a. The cone z' may be provided with any suitable cover.

What I claim is 1. An inkstand, comprising a reservoir, a relatively large chamber having a small and shallow recess in its bottom forming an ink well, and a groove leading from the recess into the reservoir, and a dipping cone pro- Gopies of this patent may be obtained for jecting from the top of the chamber down into the same and having its lower end extending into the ink well.

2. An inkstand comprising a reservoir, a comparatively large chamber having in its bottom a small and shallow circular recess forming an ink well and a groove of a depth approximately equal to the depth of the ink well and leading into the reservoir, and a dipping cone integral with the top of the chamber and extending down into the saine, said cone having a tubular lower end of slightly less diameter than that of the ink well and extending into the same.

In testimony whereof I have hereunto set my hand at Paris (France), this twentyfirst day of May, 1915.

JULES BENGU.

In the presence of two witnesses:

D. LnEcE, DE WITT C. IooLn, Jr.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

